It feels like I'm beating a dead horse at this point, but I'll provide an update nonetheless.
So I bought the module. Ordered it on July 20 and it took them forever to actually ship the damn thing (August 4), but once it did it surprisingly arrived very quickly (August 7). I think they provided express shipping to compensate for the long delay in getting the item out, which was nice.
The item itself is pretty small, about 2in x 2in pcb board. It had lengthy wires which was a relief. The install itself is pretty easy, I know the description says you need to splice 4 wires but you can get away with just jamming them in. They fit tightly and get locked into place once you put the connectors back into their slot.
There are two sets of wires you need to access. To get to one set of wires, you need to remove two panels to access the door lock wire assembly. To get to the second set of wires, you only need to remove the fuse box panel and unclip the obd slot from its holder. That way you can easily access the back of the obd tap in to the appropriate wires. I know the instructions say you need to remove the entire crash pad to access the obd but you don't.
The one difficult part was removing the hood latch handle, which is needed to remove the second panel to get to the first set of wires. It's held on by a very weak plastic screw. So weak that I actually broke it. The thing just wouldn't turn no matter how much force was used, and eventually after stripping the head quite a bit, it just broke into pieces and fell out. This kind of worked in my favour because I could remove the handle after it broke. The handle tucks into its slot pretty well and gets held into place by a patch of wires, so even without the screw it's actually pretty secure.
All in all the install was pretty easy. It took about an hour but could easily be done in 30 minutes.
The item itself works exactly as expected. Approach the car and it unlocks (at the same distance as the welcome light). Walk away from the car and it locks after ~5 seconds. You can even disable the feature by hitting lock on the keyfob 4 times quickly, which is great if you're washing the car or taking it in for service. This way you can also tuck the module away and never have to worry about it.
It's a small little robust item that seems to be built quite well and I have no worries about it lasting a long time. Other than the broken screw the install was very easy coming from someone who's never removed panelling on their car before. Overall impressed with my purchase.
Shout out to
@Toddasaurus for his guidance on how to remove the panelling for a first timer.
